gravity-feed lubricator重力: gravity; force of gravity; g ...自: self; oneself; one's own汉: the Han Dynasty the Han nati ...润滑器: lubricator重力自流润滑系统: gravity circulating oil system; gravity lubricating system; gravity oil system下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:重力自汉润滑器，即可在微信中查询翻译
